51 Fix path to libz library
#51 Don't use BAT files when not building with VS
#51 Fetch FFmpeg binaries built by MinGW too
Merge branch 'master' into 51_MSYS

* master:
  Fix aspect ratio of the movie in sample
  WIP
  Temporary save
#51 Fix FFmpeg lib suffix on non Windows target
Merge branch '49_SelectStream'
Initial import of build script for Jenkins
Fix path on OSX
Print run commands
Print working directory
Define SFML_ROOT on Windows
Add double quotes around paths
Quotes on Windows only
Avoid paths
Raw string for dir path
Try with environment variable
Give ability to build with MinGW
Replace tabs with spaces for indentation
Use generator on right CMake command...
Define generator before using it…